// 组件入口
<template>
  <div class="app-container">
    <!-- 顶部 header区域 -->
    <mt-header fixed title="Vue项目">
      <span @click='goback' slot="left" v-show='flag'>
        <mt-button icon="back">返回</mt-button>
      </span>
    </mt-header>
    <!-- 中间的 理由 router-view 区域 -->
    <transition>
      <router-view></router-view>
    </transition>
    <!-- 底部的tabbar区域 -->
    <nav class="mui-bar mui-bar-tab">
      <router-link class="mui-tab-item-1" to="/home">
        <span class="mui-icon mui-icon-home"></span>
        <span class="mui-tab-label">首页</span>
      </router-link>
      <router-link class="mui-tab-item-1" to="/member">
        <span class="mui-icon mui-icon-contact"></span>
        <span class="mui-tab-label">会员</span>
      </router-link>
      <router-link class="mui-tab-item-1" to="/shopcar">
        <span class="mui-icon mui-icon-extra mui-icon-extra-cart">
          <span class="mui-badge" id="badeg">{{ $store.getters.getAllCount }}</span>
        </span>
        <span class="mui-tab-label">购物车</span>
      </router-link>
      <router-link class="mui-tab-item-1" to="/search">
        <span class="mui-icon mui-icon-search"></span>
        <span class="mui-tab-label">搜索</span>
      </router-link>
    </nav>
  </div>
</template>

<script>
export default {
  data(){
    return  {
      flag:true
    }
  },
  methods:{
    goback() {
      // 点击后退
      this.$router.go(-1)
    }
  },
  created(){
    // 因为刷新页面时，会自动转到home页面
    // 所以在页面刷新后还没有挂载就 检测路由地址=> 是否显示返回组件
    if(this.$route.path === '/home') {
      this.flag = false
    }
  },
  // 监听路由地址，如果路由地址为 '/home' flag为false，
  // 在主页时 返回组件隐藏
  watch:{
    '$route.path':function(newVal){
      if(newVal == '/home') {
        this.flag = false;
      }else {
        this.flag = true;
      }
    }
  }
}
</script>

<style lang="" >
.app-container {
  padding-top: 40px;
	padding-bottom: 50px;
	overflow-x: hidden;
}
.mint-header.is-fixed {
  z-index: 99;
}
.v-enter {
	opacity: 0;
	transform: translateX(100%);
}
.v-leave-to {
	opacity: 0;
	position: absolute;
	transform: translateX(-100%);
}
.v-enter-active,
.v-leave-active {
	transition: all 0.5s ease;
}

.mui-bar-tab .mui-tab-item-1.mui-active {
    color: #007aff;
}
.mui-bar-tab .mui-tab-item-1 {
    display: table-cell;
    overflow: hidden;
    width: 1%;
    height: 50px;
    text-align: center;
    vertical-align: middle;
    white-space: nowrap;
    text-overflow: ellipsis;
    color: #929292;
}
.mui-bar-tab .mui-tab-item-1 .mui-icon {
    top: 3px;
    width: 24px;
    height: 24px;
    padding-top: 0;
    padding-bottom: 0;
}
.mui-bar-tab .mui-tab-item-1 .mui-icon ~ .mui-tab-label {
    font-size: 11px;
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
}
</style>
